,mnlm

An enzyme must attach to a substrate like a lock in a key.

A single cell may contain several different types of enzymes. Which must occur for an enzyme to be able to catalyze a specific reaction?

catalyze a chemical reaction with the glucose

After Audrey drinks a glass of juice, digestive processes deliver glucose to the bloodstream. From the bloodstream, glucose molecules enter the cell. In order for glucose molecules to be used by the cell, glucose-specific enzymes must do what?

720 joules

Cellular respiration is a process that produces energy for the cell and is about 40% efficient. If 1200 joules of energy are used during cellular respiration, how much of this energy will be lost as heat?

Enzymes raise the activation energy needed for a reaction.

Helena investigates how enzymes are important to body processes. How is the role of enzymes in biochemical activity BEST explained?

Enzymes recycle themselves to continuously catalyze reactions.

How can enzymes increase the rate of a chemical reaction without breaking down?

lactase

Many people are lactose intolerant and cannot digest dairy products. What enzyme are their bodies most likely lacking?

6-8

Most human enzymes operate under an optimal pH near neutral. Which pH range would best represent this environment?

an enzyme that catalyzes lactose breakdown

Some individuals are unable to digest the lactose found in the milk of cows. The digestive systems of these individuals MOST likely lack which?

Humans make an enzyme to digest starch but cannot digest cellulose.

The diagram shows two large carbohydrate molecules made by plants. Humans can use starch as an energy source, but are unable to use cellulose for energy. Which of the following BEST explains the difference in how these molecules are processed in the body? Standard(s)

Amylase lowers the activation energy required for the digestion of carbohydrates, but has no impact on the activation energy required to digest proteins

The enzyme amylase can digest carbohydrates, but it cannot digest proteins. Which explains the effect of amylase on the digestion of carbohydrates compared to proteins?

Enzymes' unique active site allows it to fit with only one substrate molecule.

Which best explains how the structure of enzymes is related to their function?

enzymes

Which most directly controls the rate at which food is broken down to release energy?

lipids and carbohydrates

Which organic molecules supply energy to cells?

Different amino acid sequences cause variations in the shapes of an enzyme's active sites.

Which statement BEST explains why enzymes bind to specific substrates?

enzymes

Which type of substances serves as a catalyst for reactions that break large food molecules into smaller useful molecules?

Enzymes are not changed when they catalyze a chemical reaction.

Why are enzymes considered reusable?

fat is to lipid

amino acid is to protein as

speed of reaction

enzymes affects the reactions in living cells by changing the

used by humans to store energy

glycogen

cellular respiration

the process that release energy from food in the presence of oxygen is

proteins

which category of organic compounds do enzymes belong?